On Amazon for $19.99.
Nice card board packaging, with seal.
There are a variety of USB port hubs; I found the one that has the SD card reader one to be quite useful. Usually my devices have at least 2 usb ports, so having more usb ports isn’t that big of an issue. The SD/TF card read is the most useful, for when I need to transport camera pictures onto computer. The best part is that it matches beautifully with my Mac Pro.